package com.xfcode.ext.bd;
import cn.hutool.json.JSONObject;
import okhttp3.*;
import java.io.*;

import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Base64;
import java.net.URLEncoder;
public class BdHttpCaller {
    public   String API_KEY = "";
    public   String SECRET_KEY = "";

    public BdHttpCaller(String apiKey, String apiSecret) {
        this.API_KEY = apiKey;
        this.SECRET_KEY = apiSecret;
    }

    final OkHttpClient HTTP_CLIENT = new OkHttpClient().newBuilder().build();
    public  String getImgText(String base64Image) {
        MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
        // image 可以通过 getFileContentAsBase64("C:\fakepath\entp4.jpg") 方法获取,如果Content-Type是application/x-www-form-urlencoded时,第二个参数传true
        RequestBody body = RequestBody.create(mediaType, "image="+base64Image);
        try {
            Request request = new Request.Builder()
                    .url("https://aip.baidubce.com/rest/2.0/image-classify/v2/advanced_general?access_token=" + getAccessToken())
                    .method("POST", body)
                    .addHeader("Content-Type", "application/x-www-form-urlencoded")
                    .addHeader("Accept", "application/json")
                    .build();
            Response response = HTTP_CLIENT.newCall(request).execute();
            return response.body().string();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 获取文件base64编码
     *
     * @param path      文件路径
     * @param urlEncode 如果Content-Type是application/x-www-form-urlencoded时,传true
     * @return base64编码信息，不带文件头
     * @throws IOException IO异常
     */
    public String getFileContentAsBase64(String path, boolean urlEncode) throws IOException {
        byte[] b = Files.readAllBytes(Paths.get(path));
        String base64 = Base64.getEncoder().encodeToString(b);
        if (urlEncode) {
            base64 = URLEncoder.encode(base64, "utf-8");
        }
        return base64;
    }


    /**
     * 从用户的AK，SK生成鉴权签名（Access Token）
     *
     * @return 鉴权签名（Access Token）
     * @throws IOException IO异常
     */
     String getAccessToken() throws IOException {
        MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
        RequestBody body = RequestBody.create(mediaType, "grant_type=client_credentials&client_id=" + API_KEY
                + "&client_secret=" + SECRET_KEY);
        Request request = new Request.Builder()
                .url("https://aip.baidubce.com/oauth/2.0/token")
                .method("POST", body)
                .addHeader("Content-Type", "application/x-www-form-urlencoded")
                .build();
        Response response = HTTP_CLIENT.newCall(request).execute();
        return new JSONObject(response.body().string()).getStr("access_token");
    }
}
